Parachute vent



G. M. BALL.

PARACHUTE VENT.

APPLICATION FILED SEPTZZ. 1920 Patented Sept. 5,

Patented Sept. 5,1922. 1,427,77l

tJNi'E'ED STATES PATENT OFFICEO GUY M. BALL, F SPOKANE, WASHDTG'EUE.

JPARAGEU'E'E VENT.

Application filed September 22, 1920. Serial Ho. H1337.

T 0 allwhomt may concern: I space E constituting the; ring vent. This 45 Be it known that l, GUY M. BALL, a citiring vent may be made any desirable size by zen of the United States, residing at Spoadjusting the cords D to expand or contract kane, in the county of Spokane and State the space between the-members A and G. of lVashington, have invented certain new The purpose of a vent is the maintenance and useful Improvements in Parachute of lateral stability which it accomplishes by 50 Vents, of which the following is a specifilessening the tendency of the parachute to cation. tip inorder to tree its lifting surfaces from This invention relates to parachutes in excess pressure air therein. The larger the general and more particularly to those havaperture is made the greater stability is ing vents for the purpose of maintaining provided, however, any great increasethere- 55 lateral stability while in descent. of would decrease the iifting power of the In the present type of vented parachute, 'device. The diameter of the vent in the the common practice is to place a vent in main parachute body A, and the diameter the form of a centrally disposed circular oi the auxiliary parachute G are made equal aperture, which is necessarily comparatively. to obtain the best result. so small in size in order not to lessen the lift- It is therefore proposed to provide a ring ing surface as a whole. vent which is advantageous in providing It is proposed to provide a -more efi'eca sufficient vent without materially lessentive means for maintaining stability of the ing the lifting surfaces, and a device less device by means of a ring vent arranged subject to atendency to tearas the ordinary 65 concentrically adjacent the peak of the paraparachute with ordinary vents disposed cenchute. it has been found that by this contrally or otherwise. struction an efi'ective means is provided for While i have'iliustrated a particular form attainin the above described desired reof my invention in the accompanying drawsult. T e at present preferred embodiings I do not wish to be limited thereto as 70 Y ments of my invention will be found in the various other forms might be claimed withaccompanying specification and annexed out departing fi'om the spirit and scope of drawings in which: my invention. f Figure 1 is a view in elevation of the 7 Having described the preferred embodiparachute showing the ring vent; and ment there0f,I claim: 75

Figure 2 is a top plan view of the para- A parachute embodying a main parachute chute showing the ring vent in its circumbody having a central circular unobstructed ferential entirety. vent, and an auxiliary parachute body As shown in the drawings, A is a parasuperposed above and in spaced relation to chute having a large' centrally disposed the main parachute body and directly con- 80 aperture B nearthe peak. Superimposed 'nec'ted along its marginal edge by flexible upon A is an auxiliary parachute C which means to the parachutebody around is closed at its peak and fastened its said vent, thediameter ofthe vent and the 40 lower side and marginal edge b means of diameter of-theauxiliary parachute being flexible" connections such as cor s D at inequal; v towels, to the main parachute A, leaving Intestimony' wherefiIfhave aflixed my a space E between the periphery of the signature. r aperture B and the lower edge of C, said GUY; BALL, 

